Couples working in the same company!

Heaven and Hell; Life and Near-death; Tolerable and Intolerable; Intelligence and Dumbness; Bearable and Unbearable;
The question for the day is ‘What is common among all these pairs of terms, other than opposites?’
My answer would be ‘Morons who got their better halves into the same company, or even worse, same project as theirs – did they [...]